There's a link on the main support.mozilla.org page under "Customizing Firefox", to this article: Customize Firefox controls, buttons and toolbars in case it helps you or anyone else finding this topic. It has a section on adding a new toolbar to Firefox.

I can't help you on creating your own button, textfield and a combo box for the new toolbar but I see you (Dinesh) asked this question on Jan 5, here:

http://groups.google.com/group/mozilla-labs-jetpack/browse_thread/thread/0d877e5afcbfe745# how to create a toolbar using add on sdk

P.S. You mentioned using add-on sdk. In case it helps, see https://addons.mozilla.org/en-US/developers/docs/sdk/1.0/packages/addon-kit/docs/widget.html

You might be better off on the Mozilla Add-ons forum:

• https://forums.mozilla.org/addons/

You can also take a look at the MozillaZine Extension Development forum.

• http://forums.mozillazine.org/viewforum.php?f=19

You need to register on the MozillaZine forum site in order to post at that forum.

See also:

• https://developer.mozilla.org/en/Building_an_Extension
• https://developer.mozilla.org/en/Extension_Frequently_Asked_Questions